Me and Nakeee created a null DSP device, supported in both Windows and linux (tested). Framerate boost and less DSound/LibAO errors. Pending work: Clean up UCodes and create something more...null. We could also hack into the HW Audio Interface (would be actual null device). Also screws up a bit of Wind Waker RTC (awesome day/night transition in save selection menu. 80FPS in save selection menu, 120FPS in logos.

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@694 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Plugins/Plugin_DSP_NULL/Src/UCodes/UCode_AX.h

@@ -0,0 +1,67 @@
+// Copyright (C) 2003-2008 Dolphin Project.
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, version 2.0.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License 2.0 for more details.
+
+// A copy of the GPL 2.0 should have been included with the program.
+// If not, see http://www.gnu.org/licenses/
+
+// Official SVN repository and contact information can be found at
+// http://code.google.com/p/dolphin-emu/
+
+#ifndef _UCODE_AX
+#define _UCODE_AX
+
+#include "UCode_AXStructs.h"
+
+class CUCode_AX	: public IUCode
+{
+public:
+	CUCode_AX(CMailHandler& _rMailHandler, bool wii = false);
+	virtual ~CUCode_AX();
+
+	void HandleMail(u32 _uMail);
+	void MixAdd(short* _pBuffer, int _iSize);
+	void Update();
+
+private:
+
+	enum
+	{
+		NUMBER_OF_PBS = 64
+	};
+
+	enum
+	{
+		MAIL_AX_ALIST = 0xBABE0000,
+		AXLIST_STUDIOADDR = 0x0000,
+		AXLIST_PBADDR  = 0x0002,
+		AXLIST_SBUFFER = 0x0007,
+		AXLIST_COMPRESSORTABLE = 0x000A,
+		AXLIST_END = 0x000F
+	};
+
+	// PBs
+	u32 m_addressPBs;
+
+	int *templbuffer;
+	int *temprbuffer;
+
+	bool wii_mode;
+
+	// ax task message handler
+	bool AXTask(u32& _uMail);
+
+	void SendMail(u32 _uMail);
+	int ReadOutPBs(AXParamBlock *_pPBs, int _num);
+	void WriteBackPBs(AXParamBlock *_pPBs, int _num);
+	s16 ADPCM_Step(AXParamBlock& pb, u32& samplePos, u32 newSamplePos, u16 frac);
+};
+
+#endif  // _UCODE_AX